What is CVE-2017-13906?

CVE-2017-13906 is a high-severity vulnerability in Apple macOS, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 7.8/10. Published 2021-12-23.

How severe is CVE-2017-13906?

High severity. CVSS v3 base score is 7.8 out of 10.

Buffer overflow in Apple macOS

CVE-2017-13906

A memory corruption issue was addressed with improved memory handling. This issue is fixed in macOS High Sierra 10.13.1, Security Update 2017-001 Sierra, and Security Update 2017-004 El Capitan, macOS High Sierra 10.13. A malicious application may be able to elevate privileges.

Vulnerability class: Buffer Overflow

Published 2021-12-23 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.006 (47.6th percentile), scored 2026-10-03.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 48th percentile — 47.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: 0.000

Affected products

Apple macOS — versions unspecified
Apple Mac OS X — versions 10.11.6

Weakness classification (CWE)

CWE-119 — Improper Restriction of Operations within the Bounds of a Memory Buffer

References

support.apple.com/en-us/HT208221 (Vendor Advisory)
support.apple.com/en-us/HT208144 (Vendor Advisory)

Frequently asked questions

What is CVE-2017-13906?: CVE-2017-13906 is a high-severity vulnerability in Apple macOS, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 7.8/10. Published 2021-12-23.
How severe is CVE-2017-13906?: High severity. CVSS v3 base score is 7.8 out of 10.